DTC C0040 Setting Intermittently - keywords chassis code connector DTC EBCM EBTCM harness intermittent light sensor speed sym00 sym5a wheel WSS

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Technicians are replacing the Right front wheel speed sensors. Warranty parts returns have shown the wheel speed sensors to be good. The issue is most likely caused by the connector for the WSS just below the under hood bussed electrical center not fully seated.

Please check the connector for correct assembly. When the vehicle is assembled the Speed Sensor pigtail is connected to the Engine Harness. Then the harness is secured by the rose bud push pin to the engine assembly. While installing this push pin, it is very easy to push the release button accidentally -- which disconnects the speed sensor, setting the fault code.

(1) Release Button

(2) Rose Bud Push Button

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.